During gameplay, at an arbitrary point during the attack/transfer stage of an arbitrary turn, possibly a region (a group of territories, not necessarily belonging to the same player or the same bonus) might be exposed to a disaster, meaning that the number of armies in each territory in this region is reduced.
The reductions are due to a single external event intervening into the game, so to say: not controlled, planned or foreseeable by any player. It might affect each territory differently: in some territories, e.g., 20% of the armies die, while in some others all of them might die (the result being 0 neutrals).
All of this is randomized: the size of the region (it could affect the whole map), the location of the region on the map, the timing of the disaster, its strength - whatever you can think of.
And principally, the disaster is neutral towards the players: there's no concern regarding the strengths of them, their relations to each other, their gameplay history, their number, etc. If a player happens to be in that region affected by the disaster, then that player is affected by the disaster - as simple as that.
Imagine how exciting a game would be if this was implemented. (Can you?)
A thread in the general forum (and my contribution to that, which's the one pasted above) inspired me to start this one.
It is intentionally started in the off-topic forum, so you're not even limited with WL-related suggestions!